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BS 970 (Part 1) 709M40 vs EN 10028-2 10CrMo9-10

Related Material — 55.8% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 709M40 (BS 970 (Part 1):1991) and EN 10028-2 10CrMo9-10 (EN 10028-2:2017) are both steel grades. Both fall under the Alloy Steel category. BS 970 (Part 1) 709M40 is typically used for used for aircraft parts, heavy-duty gears, transmission shafts, connecting rods, crankshafts, and engineering fasteners., while EN 10028-2 10CrMo9-10 is commonly used for flat products for pressure purposes. BS 970 (Part 1) 709M40 is defined under British Standards (BS), originating from United Kingdom, while EN 10028-2 10CrMo9-10 is defined under European Standard (EN), originating from Europe.

As per chemical composition, BS 970 (Part 1) 709M40 vs EN 10028-2 10CrMo9-10 is a 55.8% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 55.8%.

Frequently Compared With BS 970 (Part 1) 709M40:
UNI 11234 100Cr6 NF A35-565 100C6 GB/T 3077 12Cr2Ni4A GOST 4543 12HN3A IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 07Cr4Mo6 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 103Cr6
Match Breakdown
CHEMISTRY MATCH
55.8%
MECHANICAL MATCH
No shared data
OVERALL
55.8%
Specifications
Property BS 970 (Part 1) 709M40 EN 10028-2 10CrMo9-10
Standard BS 970 (Part 1):1991 EN 10028-2:2017
Category Alloy Steel Alloy Steel
C (%) 0.36-0.44 0.08-0.14
Mn (%) 0.70-1.00 0.40-0.80
Cr (%) 0.90-1.20 2.00-2.50
Mo (%) 0.25-0.35 0.90-1.10
Si (%) Not specified <=0.50
P (%) Not specified <=0.020
S (%) Not specified <=0.010
N (%) Not specified <=0.012
Cu (%) Not specified <=0.30
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property BS 970 (Part 1) 709M40 EN 10028-2 10CrMo9-10
Tensile Strength Not specified 480-630 MPa
Yield Strength Not specified >=310 MPa
Elongation Not specified >=18%
Condition Not specified Usual delivery condition normalized and tempered (+NT), nominal thickness up to 16 mm; transverse direction, Yield Strength is ReH, Elongation is A
Typical Applications
BS 970 (Part 1) 709M40
Used for aircraft parts, heavy-duty gears, transmission shafts, connecting rods, crankshafts, and engineering fasteners.
EN 10028-2 10CrMo9-10
Flat products for pressure purposes
Key Differences
Can BS 970 (Part 1) 709M40 Be Substituted With EN 10028-2 10CrMo9-10?
BS 970 (Part 1) 709M40 and EN 10028-2 10CrMo9-10 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
Forms & Sizes Available on M-EX
BS 970 (Part 1) 709M40
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6600–6800 mm (259.84–267.72 in)
EN 10028-2 10CrMo9-10
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On M-EX Right Now
BS 970 (Part 1) 709M40
2 active listings and RFQs →
EN 10028-2 10CrMo9-10
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 (Part 1) 709M40 and EN 10028-2 10CrMo9-10?
EN 10028-2 10CrMo9-10 specifies Si, P, S, N which are not specified for BS 970 (Part 1) 709M40.
Can BS 970 (Part 1) 709M40 be substituted with EN 10028-2 10CrMo9-10?
BS 970 (Part 1) 709M40 and EN 10028-2 10CrMo9-10 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.